The Big Bang Theory Gang Geeks Out Over Their Favorite Moments from 100 Episodes

CBS’ The Big Bang Theory celebrates its 100th episode tonight at 8/7c with a “risky” revisitation of the Penny/Leonard relationship. To mark the auspicious occasion, TVLine asked the show’s cast, creators and frequent guest stars to reflects on their favorite moments and themes to date.

A front-runner emerged featuring a classic Sheldon and Penny scene, while the newest additions to the sitcom — Amy and Bernadette — got plenty of love too. Check out the quotables below and then hit the comments with your favorite scenes. (Reporting by Carrie Bell)